Durability analysis of bio-cemented slope soil under the exposure of acid rain

Abstract Purpose Instability of slope surface is a critical concern in Geotechnical and Environmental Engineering. MICP (Microbial-Induced Carbonate Precipitation), an innovative bio-cementation technique, has attracted the attention for protection. In this work, was investigated to evaluate its durability under exposure acid rain advance understanding on long-term performance soil preserved by MICP. Methods treatment applied fine-grained using indigenous bacteria. Specimens treated different cementation levels (% CaCO 3 ) were exposed (of varying pH) through two sorts mechanisms: (i) infiltration (ii) immersion. The evaluations based corrosion , mass loss, needle penetration tests, scanning electron microscopy. Results decrease pH increased resulting considerable loss aggregate unconfined compressive strength. However, level showed high specimens. soils 12.5% 19.9% whereas it reduced 5.4% when cemented 22.5% . results also revealed that contact time significantly governed rate corrosion, i.e., specimens subjected lower (20 mm/h) higher compared (100 mm/h). Conclusion determined level, pH, (iii) rain. High promotes longevity treatment. Therefore, recommended preservation surface.